Learn C# Programming

Master C# programming from basics to advanced concepts with our comprehensive tutorial series. Perfect for beginners and experienced developers.

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Tutorial Contents
Getting Started
Fundamentals
Control Flow
Functions
Arrays & Collections
Object-Oriented Programming
Advanced Topics

C# Keywords and Identifiers

What are Keywords?

Keywords are reserved words in C# that have special meanings. You cannot use them as identifiers (variable names, method names, etc.).

Common C# Keywords

Category Keywords
Data Types int, string, bool, double, float, char
Control Flow if, else, switch, case, for, while
Access Modifiers public, private, protected, internal
Class Related class, interface, abstract, static

What are Identifiers?

Identifiers are names given to variables, methods, classes, etc. They must follow certain rules:

Identifier Rules
  • Must start with a letter or underscore (_)
  • Can contain letters, digits, and underscores
  • Cannot be a keyword
  • Case-sensitive
  • No spaces allowed

Valid Identifiers

// Valid identifiers
int age;
string firstName;
double _salary;
bool isActive;
int number1;
string userName;

Invalid Identifiers

// Invalid identifiers
int 2number;     // Cannot start with digit
string first-name; // Cannot contain hyphen
bool class;      // Cannot use keyword
double my var;   // Cannot contain space

Naming Conventions

PascalCase

Classes, Methods, Properties

MyClass, GetUserName()
camelCase

Variables, Parameters

userName, firstName
Previous: Hello World
Next: Variables & Constants

Frequently Asked Questions

C# is a modern, object-oriented programming language developed by Microsoft. It's part of the .NET framework and is used for developing various applications including web applications, desktop software, mobile apps, and games.

No! You can start learning C# immediately using our online compiler. For advanced development, you can install the .NET SDK and Visual Studio or VS Code on your computer.

Yes! C# has a clean syntax and strong type system that makes it beginner-friendly. Our tutorial starts from the basics and gradually progresses to advanced topics.

C# is versatile and can be used to build web applications (ASP.NET), desktop applications (WPF, WinForms), mobile apps (Xamarin), games (Unity), APIs, microservices, and much more.

The time varies based on your programming background. Complete beginners can learn the basics in 2-3 months with consistent practice. Our structured tutorial helps you progress systematically.

Master C# Programming with Our Comprehensive Tutorial

Our C# programming tutorial is designed to take you from a complete beginner to an advanced developer. Whether you're looking to build web applications, desktop software, or mobile apps, C# provides the foundation you need for modern software development.

Start with the basics like variables, data types, and control structures, then progress to advanced topics including object-oriented programming, LINQ, async programming, and more. Each lesson includes practical examples and exercises to reinforce your learning.

Join thousands of developers who have learned C# programming through our step-by-step tutorials. Begin your journey today and unlock the power of .NET development.